Based on the 4-door Subaru Impreza WRX STI, S206 is the newest model in STI’s “S” series. This series dons the crown of STI tuned cars with advanced driving performance and exclusively-made items in both interior and exterior designs. As with former STI models such as S204 and R205, S206 is founded on the Impreza WRX STI line.
S206’s body and engine were tuned to perform as expected of STI’s best model. The body employs exclusive Bilstein shock absorbers, STI coil springs, a flexible tower bar (front), and a flexible draw stiffener (front). While improving straight-driving performance, motion is steadied when going into corners so that precise and quick turning is possible. Plus, “Michelin Pilot Super Sport” tires provide refined driving comfort in combination with “BBS” 19-inch aluminum wheels made only for this model.
In the exclusively-made engine, the weight balance between piston, connecting rod, and crankshaft is optimized to enhance the rev feel. Along with a ball bearing turbocharger, ECU (Engine Control Unit) with STI tuning, and a sports muffler with lowered back pressure exhaust - all of which were designed for this model - the engine can deliver 235kW / 320PS) in maximum output and 431N.m (44kg.m) in maximum torque. The accelerator response is heightened and low to mid range torque increased, thereby offering better driveability.
Source: Subaru Press Release